build: Link Foundation framework in build.rs

Link Foundation instead of CoreServices to provide the missing
Objective-C symbols; many ObjC APIs live in Foundation

Author: hoodie

build.rs

@@ -23,7 +23,7 @@ fn main() {
             .compile("notify");
 
         // Link the macOS frameworks that provide the missing symbols:
-        println!("cargo:rustc-link-lib=framework=CoreServices"); // for LSCopyApplicationURLsForBundleIdentifier (LaunchServices)
+        println!("cargo:rustc-link-lib=framework=Foundation"); // safe to include; many ObjC APIs live here
 
         println!("cargo:rerun-if-env-changed={}", DEPLOYMENT_TARGET_VAR);
         println!("cargo:rerun-if-changed=build.rs");